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830142515990 = 25279991296489
BaseRepresentation
bin11000001010010000101…
…10011000101100010110
32221100202001121012112202
430011020112120230112
5102100112441002430
61433210123044502
7113655463650254
oct14051026305426
92840661535482
10830142515990
112a0074899137
12114a79070732
1360388a20058
142c2716ab5d4
15168d96bcd45
hexc148598b16

830142515990 has 16 divisors (see below), whose sum is σ = 1494266905440. Its totient is φ = 332054700480.

The previous prime is 830142515977. The next prime is 830142516043. The reversal of 830142515990 is 99515241038.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2651666 + ... + 2948154.

It is an arithmetic number, because the mean of its divisors is an integer number (93391681590).

Almost surely, 2830142515990 is an apocalyptic number.

830142515990 is a deficient number, since it is larger than the sum of its proper divisors (664124389450).

830142515990 is a wasteful number, since it uses less digits than its factorization.

830142515990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576487.

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 830142515990 in words is "eight hundred thirty billion, one hundred forty-two million, five hundred fifteen thousand, nine hundred ninety".

Divisors: 1 2 5 10 279991 296489 559982 592978 1399955 1482445 2799910 2964890 83014251599 166028503198 415071257995 830142515990